In the figure shown, the coefficient of static friction between the block A of mass 20 kg and horizontal table is 0.2. What should be the minimum mass of hanging block just beyond which blocks start moving?

Question

In the figure shown, the coefficient of static friction between the block A of mass 20 kg and horizontal table is 0.2. What should be the minimum mass of hanging block just beyond which blocks start moving? (A) 2 kg (B) 3 kg (C) 4 kg (D) 5 kg

Tardigrade Admin · Accepted Answer

Tension produced in the string should be just greater than the frictional force acting on the 20 kg block T=mB g T > μ m A g mB g > (0.2)(20(g) mB > 4 kg

Q. In the figure shown, the coefficient of static friction between the block $A$ of mass $20 k g$ and horizontal table is $0.2$ . What should be the minimum mass of hanging block just beyond which blocks start moving?

2 kg

3 kg

4 kg

5 kg

Tension produced in the string should be just greater than the frictional force acting on the $20 k g$ block
$T = m_{B} g$
$T > μ m_{A} g$
$m_{B} g > (0.2) (20 (g)$
$m_{B} > 4 k g$

Q. In the figure shown, the coefficient of static friction between the block A of mass 20kg and horizontal table is 0.2. What should be the minimum mass of hanging block just beyond which blocks start moving?